Haut-Rhin
Haut-Rhin is a French department in the Grand Est region, incorporated into the European Collectivity of Alsace alongside Bas-Rhin from 1 January 2021.
Last updated August 25, 2026
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Overview
Haut-Rhin is a department of northeastern France, located in the historic region of Alsace and now within the Grand Est administrative region. Its name means “Upper Rhine,” reflecting its position along the upper course of the Rhine, which forms much of its eastern boundary with Germany. The department also borders Switzerland to the south, the Territoire de Belfort and the Vosges department to the west, and Bas-Rhin to the north. Colmar is the departmental prefecture, while Mulhouse is the largest city and a major industrial and metropolitan centre. Created on 4 March 1790 during the French Revolution, Haut-Rhin was one of France’s original departments. It was formed from the southern part of the former province of Alsace, historically known as Haute-Alsace. Its territorial extent has changed repeatedly as a result of French, Swiss and German political changes. In 1798 it absorbed Mulhouse, formerly a self-governing allied city, as well as the last Swiss enclave in southern Alsace. In 1800 it incorporated the Mont-Terrible department, created from territories that had previously belonged to the Prince-Bishopric of Basel. Most of those lands were returned to Switzerland in 1814, while the former County of Montbéliard remained temporarily attached before being transferred to the Doubs department in 1816. The most consequential change came after the Franco-Prussian War. Under the Treaty of Frankfurt in 1871, most of Haut-Rhin was annexed by the German Empire. The part that remained French became the Territoire de Belfort, which was formally constituted as a separate department in 1922. Haut-Rhin returned to France under the Treaty of Versailles in 1919, but it remained administratively distinct from Belfort. During the Second World War, the territory was annexed de facto by Nazi Germany in 1940 and recovered by France in 1944. Geographically, the department combines the Rhine plain, the foothills and uplands of the Vosges, the vineyards and villages of central Alsace, and the wooded and agricultural landscapes of the Sundgau in the south. Its climate is broadly semi-continental. The territory has a dense cross-border relationship with Germany and Switzerland, particularly around Saint-Louis, Mulhouse and the Basel metropolitan area. EuroAirport Basel–Mulhouse–Freiburg, located at Saint-Louis, is the principal airport serving the department and the surrounding trinational region. Haut-Rhin has a diversified economy. Mulhouse has long been associated with manufacturing, engineering, textiles, chemicals and automobile production, including the Stellantis Mulhouse plant. The southern part of the department benefits from employment links with Basel, where many residents commute to work, particularly in the chemical and life-sciences sectors. This prosperity coexists with significant regional inequality: the Basel-facing and some rural areas have comparatively strong labour markets, while Mulhouse has experienced persistent social and economic challenges despite its industrial importance. The department retains distinctive Alsatian institutional and cultural features. Along with Bas-Rhin and Moselle, it is covered by elements of local law that survived the period of German administration between 1871 and 1919. These rules affect areas including religious institutions, social protection, local administration, economic regulation and hunting. Alsatian linguistic and cultural traditions remain important, although everyday language use has declined. On 1 January 2021, the departmental collectivities of Bas-Rhin and Haut-Rhin were merged to create the European Collectivity of Alsace. Haut-Rhin continues to function as a geographic and administrative district, while the new collectivity exercises the former departmental responsibilities across both territories.
History
Haut-Rhin was established on 4 March 1790 as one of the 83 departments created by the French Revolution. It was formed from the southern half of the former Alsace province, then generally referred to as Haute-Alsace. The new department was designed as a territorial and administrative unit of the French state, replacing the older provincial and seigneurial structures. Its borders changed several times during the Revolutionary and Napoleonic periods. In 1798, Haut-Rhin incorporated Mulhouse, a formerly independent city closely associated with the Swiss Confederation, and absorbed the remaining Swiss enclave in southern Alsace. In 1800, the department was enlarged through the incorporation of the Mont-Terrible department, which had been created from territories taken from the Prince-Bishopric of Basel. Following the fall of Napoleon, most of the former Mont-Terrible lands were restored to Switzerland in 1814. The former County of Montbéliard remained attached to Haut-Rhin for a further period before being transferred to the Doubs department in 1816. The Franco-Prussian War brought a fundamental territorial rupture. The Treaty of Frankfurt in 1871 transferred most of Haut-Rhin to the German Empire. The remaining French portion was administered separately and eventually became the Territoire de Belfort in 1922. After the First World War, the Treaty of Versailles returned Alsace to France in 1919. Haut-Rhin was reconstituted as a French department but did not regain the territory that had become Belfort. During the Second World War, Haut-Rhin was annexed de facto by Nazi Germany in 1940. German authorities attempted to integrate the territory into the Reich and subjected the population to policies of political, linguistic and cultural Germanisation. French forces recovered the department in 1944, after which it was restored to French administration. Postwar Haut-Rhin developed as an industrial and cross-border department. Mulhouse remained a major manufacturing centre, with important textile, mechanical, chemical and automobile activities. Colmar developed as an administrative, cultural and tourism centre, while the southern department became increasingly connected to the Basel urban and employment region. The Rhine corridor and the department’s position between France, Germany and Switzerland encouraged cross-border commuting, trade and infrastructure cooperation. Haut-Rhin and the neighbouring Bas-Rhin department retained parts of Alsatian local law after the return to France. This legal regime, also shared in relevant areas with Moselle, preserved certain provisions introduced or maintained during the period of German rule. It covers selected matters relating to religious organisations, social rights, local government, insurance, economic life and hunting. The department also preserved a distinctive regional culture expressed through Alsatian architecture, foodways, festivals, local customs and linguistic traditions. Institutionally, the most important recent development was the creation of the European Collectivity of Alsace on 1 January 2021. The new collectivity brought together the former departmental collectivities of Haut-Rhin and Bas-Rhin. It assumed their principal departmental responsibilities and added a stronger formal role in cross-border cooperation, while Haut-Rhin continued to exist as a named territory and administrative district. Its prefecture remains in Colmar, and its principal urban centre remains Mulhouse. In the twenty-first century, the territory combines public administration, industry, agriculture, tourism and extensive economic links with the Upper Rhine region.
- 2021
European Collectivity of Alsace established
[1]The former departmental collectivities of Haut-Rhin and Bas-Rhin were merged into the European Collectivity of Alsace.
- 1944
Recovered by France
[1]The department was recovered by France and returned to French administration during the liberation of Alsace.
- 1940
De facto annexation by Nazi Germany
[1]Haut-Rhin was annexed de facto by Nazi Germany during the Second World War.
- 1922
Territoire de Belfort formalised
[1]The part of the former department that had remained French after 1871 was formally organised as the separate Territoire de Belfort.
- 1919
Returned to France
[1]The Treaty of Versailles returned Alsace, including Haut-Rhin, to French sovereignty after the First World War.
- 1871
Most of the department annexed by Germany
[1]The Treaty of Frankfurt transferred most of Haut-Rhin to the German Empire; the remaining French territory later became the Territoire de Belfort.
- 1816
Montbéliard transferred to Doubs
[1]The former County of Montbéliard was removed from Haut-Rhin and transferred to the Doubs department.
- 1814
Most Mont-Terrible territories returned to Switzerland
[1]Following the Napoleonic Wars, the territories formerly belonging to Mont-Terrible were largely restored to Switzerland, apart from the area associated with Montbéliard.
- 1800
Mont-Terrible incorporated
[1]Haut-Rhin absorbed the former Mont-Terrible department during the Napoleonic administrative reorganisation.
- 1798
Mulhouse and a Swiss enclave incorporated
[1]The department absorbed Mulhouse, formerly a free and closely Swiss-associated city, along with the last Swiss enclave in southern Alsace.
Products and positioning
A historically Alsatian, economically diverse and strongly cross-border French territory positioned between the Vosges, the Rhine, Germany and Switzerland. Since 2021, its departmental responsibilities have been integrated into the European Collectivity of Alsace.
Brand decisions
2021
Transfer of departmental responsibilities to the European Collectivity of AlsaceStrategyBackground
Haut-Rhin and Bas-Rhin had long shared a common Alsatian identity and faced similar cross-border, transport and regional-development issues.
Action taken
The two former departmental collectivities were combined on 1 January 2021 into the European Collectivity of Alsace, which assumed their principal departmental powers.
Aftermath
Haut-Rhin remained a recognised geographic and administrative territory, while Colmar continued to serve as its prefectural centre within the new institutional framework.
Sources2 sources
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